Vestnik Moskovskogo Universiteta Seriya 3 Fizika Astronomiya最新文献_第2页

Quantum hydrodynamic representation of the exchange interaction in the theory of description of magnetically ordered media 磁有序介质描述理论中交换相互作用的量子流体力学表示

Vestnik Moskovskogo Universiteta Seriya 3 Fizika Astronomiya Pub Date : 2023-09-20 DOI: 10.55959/msu0579-9392.78.2340103

P.A. Andreev, M.I. Trukhanova

引用次数: 0

Drift flow on the water surface with a film of hydrophobic particles in a uniform and decelerating air flow 在均匀的减速气流中，有疏水颗粒膜在水面上漂移

Vestnik Moskovskogo Universiteta Seriya 3 Fizika Astronomiya Pub Date : 2023-09-20 DOI: 10.55959/msu0579-9392.78.2340902

I.N. Ivanova, O.N. Melnikova

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Electrophysical Properties of Methylammonium Alum Single Crystals: The Role of the Hydrogen Bond Network in the Formation of Temperature Anomalies 甲基铵明矾单晶的电物理性质:氢键网络在温度异常形成中的作用

Vestnik Moskovskogo Universiteta Seriya 3 Fizika Astronomiya Pub Date : 2023-09-20 DOI: 10.55959/msu0579-9392.78.2340503

N.D. Gavrilova, I.A. Malyshkina, O.D. Novik

{"title":"Electrophysical Properties of Methylammonium Alum Single Crystals: The Role of the Hydrogen Bond Network in the Formation of Temperature Anomalies","authors":"N.D. Gavrilova, I.A. Malyshkina, O.D. Novik","doi":"10.55959/msu0579-9392.78.2340503","DOIUrl":"https://doi.org/10.55959/msu0579-9392.78.2340503","url":null,"abstract":"Pyroelectric, dielectric properties, and thermodepolarization currents of methylammonium alum crystallohydrate single crystals were studied in temperature range 120–200 K. Temperature dependences of these quantities demonstrated peaks at ∼143, ∼160, and 176.4 K (Curie point). The behavior, which is typical to many crystals with a network of hydrogen bonds with an O–H...O distance of ∼2.7 ± 0.1 ˚A, is considered from the point of view of a quantum chemical model of a hydrogen bond network containing water clusters in addition to individual H2O molecules. The movement of bridging protons in molecular clusters in electric fields is coherent and correlated, and all bridging protons of the system are involved in it. These displacements are associated with oscillations of the oxygen frame of the compression-tension type. The discreteness of the temperature peaks of the electrophysical properties is associated with the discreteness of the energy levels of the double-well potential, caused by the splitting of the excited levels.","PeriodicalId":484854,"journal":{"name":"Vestnik Moskovskogo Universiteta Seriya 3 Fizika Astronomiya","volume":"162 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136312947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Some properties of the Sharma–Mittal statistical distribution Sharma-Mittal统计分布的一些性质

Vestnik Moskovskogo Universiteta Seriya 3 Fizika Astronomiya Pub Date : 2023-09-20 DOI: 10.55959/msu0579-9392.78.2340102

T. N. Bakiev, D. V. Nakashidze, A. M. Savchenko, K. M. Semenov

引用次数: 0

Notes on inverse Compton scattering 关于逆康普顿散射的说明

Vestnik Moskovskogo Universiteta Seriya 3 Fizika Astronomiya Pub Date : 2023-09-20 DOI: 10.55959/msu0579-9392.78.2340201

K.A. Bornikov, I.P. Volobuev, Yu.V. Popov

引用次数: 0

A test experiment on determining the cluster structure of highly excited states of 6Li 测定6Li高激发态团簇结构的测试实验

Vestnik Moskovskogo Universiteta Seriya 3 Fizika Astronomiya Pub Date : 2023-09-20 DOI: 10.55959/msu0579-9392.78.2340202

M.V. Mordovskoy, A.A. Kasparov, A.A. Afonin, V.P. Zavarzina, A.S. Kurlovich, V.V. Mitcuk, I.V. Surkova

引用次数: 0

Effect of fluorination on properties of thiophene-phenylene co-oligomers with annulated core: a DFT study 氟化对环芯噻吩-苯基共低聚物性能的影响:DFT研究

Vestnik Moskovskogo Universiteta Seriya 3 Fizika Astronomiya Pub Date : 2023-09-20 DOI: 10.55959/msu0579-9392.78.2340405

S.N. Korchkova, A.Yu. Sosorev

{"title":"Effect of fluorination on properties of thiophene-phenylene co-oligomers with annulated core: a DFT study","authors":"S.N. Korchkova, A.Yu. Sosorev","doi":"10.55959/msu0579-9392.78.2340405","DOIUrl":"https://doi.org/10.55959/msu0579-9392.78.2340405","url":null,"abstract":"Organic light-emitting transistors are a new type of optoelectronic devices that combine the functionality of OLED and a transistor that controls it. The working layer of these devices requires organic semiconductors that combine high charge mobility with a high photoluminescence quantum yield. One of the promising classes of such materials are thiophene-phenylene co-oligomers, the properties of which can be tuned over a wide range by adding various substituents. In this work, we address the effect of fluorination on the properties of two model thiophene-phenylene co-oligomers with an annulated central fragment, P–TTA–P and P–BTBT–P. It is shown that fluorination of both molecules lowers their frontier orbitals energy levels, and this should enable electron transport in their crystals and films. At the same time, fluorination has a qualitatively different effect on the delocalization of frontier orbitals, the width of the optical gap, the oscillator strength, the exciton binding energy, and the Raman spectrum, which is explained by the difference in the equilibrium geometry of fluorinated molecules. It is expected that the revealed relationships between the structure and properties of the studied compounds will contribute to the rational design of organic semiconductors for efficient light emitting devices.","PeriodicalId":484854,"journal":{"name":"Vestnik Moskovskogo Universiteta Seriya 3 Fizika Astronomiya","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136310736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Many-Particle Interactions on the Transport Properties of Low-Energy Ions in Carbon Nanotubes 多粒子相互作用对碳纳米管中低能离子输运性质的影响

Vestnik Moskovskogo Universiteta Seriya 3 Fizika Astronomiya Pub Date : 2023-09-20 DOI: 10.55959/msu0579-9392.78.2340505

E.A. Vorobyeva, A.V. Stepanov, A.P. Evseev

{"title":"Effect of Many-Particle Interactions on the Transport Properties of Low-Energy Ions in Carbon Nanotubes","authors":"E.A. Vorobyeva, A.V. Stepanov, A.P. Evseev","doi":"10.55959/msu0579-9392.78.2340505","DOIUrl":"https://doi.org/10.55959/msu0579-9392.78.2340505","url":null,"abstract":"Using the method of molecular dynamics, the significance of many-particle interactions in the dynamics of low-energy ions in carbon nanotubes is studied, and the necessity of taking into account such interactions in the corresponding molecular dynamics calculations is shown. The effect of elastic perturbations of the carbon nanotube wall on the motion of ions inside the nanotube channel has been studied. It was found that the ion energy losses decrease by a factor of 1.5–3 when the influence of the perturbation of the carbon nanotube wall on the motion of ions is taken into account when the ion velocity approaches the perturbation propagation velocity. It has also been shown that the effect of the interaction between moving ions and perturbations of the carbon nanotube wall becomes more monotonic with a decrease in the magnitude of thermal fluctuations of the nanotube wall, in terms of energy losses by ions. Within the framework of the model under consideration, the stopping power of the electron gas bound to the atoms that form the walls of a carbon nanotube is small compared to the energy losses of ions due to elastic collisions with nanotube atoms.","PeriodicalId":484854,"journal":{"name":"Vestnik Moskovskogo Universiteta Seriya 3 Fizika Astronomiya","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136313536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spectral barcode based on one-dimensional photonic crystal with continuous refractive index modulation 基于一维光子晶体连续折射率调制的光谱条形码

Vestnik Moskovskogo Universiteta Seriya 3 Fizika Astronomiya Pub Date : 2023-09-20 DOI: 10.55959/msu0579-9392.78.2340402

S.E. Svyakhovskiy, N.I. Pyshkov

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Approximate equations for the reflection from a quarter-wavelength absorbing layer 四分之一波长吸收层反射的近似方程

Vestnik Moskovskogo Universiteta Seriya 3 Fizika Astronomiya Pub Date : 2023-09-20 DOI: 10.55959/msu0579-9392.78.2340301

А.О. Shiryaev, K.N. Rozanov, D.A. Petrov

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